Add 6/12 and 54/21
1st number: 6/12, 2nd number: 2 12/21
6/12 + 54/21 is 43/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
6/12 = 6 × 7/12 × 7 = 42/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
54/21 = 54 × 4/21 × 4 = 216/84 - Add the two like fractions:
42/84 + 216/84 = 42 + 216/84 = 258/84 - 258/84 simplified gives 43/14
- So, 6/12 + 54/21 = 43/14
In mixed form: 31/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/24+54/21 6/12+54/42 18/12+54/21 6/36+54/21 6/12+54/63 30/12+54/21 6/60+54/21 42/12+54/21 6/84+54/21